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Allowance for Loan Losses (Loan Portfolio Summarized by Categories) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio $ 515,652 $ 486,161
Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 115,912 102,822
Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 396,740 383,339
Pass [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 472,800 443,771
Pass [Member] | Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 104,296 99,886
Pass [Member] | Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 368,504 343,885
Special Mention [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 23,673 20,864
Special Mention [Member] | Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 8,904 28
Special Mention [Member] | Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 14,769 20,836
Substandard [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 15,711 19,918
Substandard [Member] | Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 2,712 2,908
Substandard [Member] | Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 12,999 17,010
Doubtful [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 468 1,608
Doubtful [Member] | Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio      
Doubtful [Member] | Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio $ 468 $ 1,608